1. Send them an email.
Quick and to the point, show that you're all business and you're going to host an incredible event. The best way to do so is to identify who is going to be there. Think about who that partner wants to target and include that in the subject line or in the first sentence of your email for who is going to be at this event.
2. Get them on the phone.
A quick, 15-minute phone call is all you need, and in this process, you're going to ask them a lot of the questions that you're going to need in order to create a one-sheet to pitch them on.
Now, you're going to have to have created this one-sheet template beforehand. I can't stress this enough — don't send them the one-sheet or a deck before you get on a call with them, because they're going to answer a lot of the most important questions on that first call. Get that one-sheet ready, but send it right after the call. And along with the one-sheet, or as a follow-up to the one-sheet, you're really going to want to identify all the steps: what do they need to do to sign up and what will they need to do to make this partnership successful.
3. Give them event details that feel real.
What you're going to want to do is really bring this event to life. Give it a title. Make it feel like an event. Don't forget: An event has a date. It has a time. That's what an event has. It has specifics, and details, and logistics already baked in.
Even if those are TBD, don't make them TBD. Give at least work-in-progress text. Then what you want to do is outline the when and the where of the event. If it's a cool venue, take pictures of the venue, throw that right on the one-sheet. Again, you want to make this feel very real.
Who is going to be at this event? You want to brag here. You're going to have celebrities, VIPs, influencers, press, clients, prospects. You might even go as far as to list all of the different titles of the people who will be attending, or maybe even attendees from previous events is a great place to put here. You really want to brag about your audience or at least your target audience.
You want to get people excited about this event. Don't forget: They need to fall in love with this event in order to partner with you on it.
4. Tell them what's in it for them.
Lastly, outline the benefits that they're going to get. Are they going to get access to the list after the event? VIP tickets? Are they going to get inclusion in pre- and post-event promotion? Are they going to get logos on the website? What are they going to get by partnering with you on this event?
You want to list out all those things on a one-sheet, not a deck. A one-sheet is one sheet. If you can put this in a one-sheet and put it in somebody's inbox, even, copy and paste it into the email, you're going to find that you're going to have a much higher hit rate. Again, you're going to send that one-sheet after that first phone call.